Method of and apparatus for attaching jackets to press cylinders



F. S. ENGLISH Jan. 7, 1930.

METHOD OF AND APPARATUS FOR ATTACHING JACKETS T0 PRESS CYLINDERS Filed Sept. 2, 1926 4 Sheets-Sheet l 7M 6 awueutoz Jan. 7,1930. F. s. ENGLISH 1,742,303

METHOD OF AND APPARATUS FOR ATTACHING JACKETS TO PRESS CYLINDEfiS Filed Sept. 2, 1926 4 Sheets-Sheet 2 F. S. ENGLISH flan. 7, 1930.

METHOD OF AND APPARATUS FOR ATTACHING JACKETS T0 PRESS CYLINDERS Filed Sept. 1926 4 Sheets-Sheet 3 auto:

Jan. 7, 1930. F. s. ENGLISH 1,742,308

METHOD OF AND APPARATUS FOR ATTACHING JACKETS To PRESS CYLINDERS Filed SepLZ. 1926 4 Sheets-Sheet 4 4 sm au ,4

Patented Jan. 7, 1930 1 UNITED STATES PATE NT OFFICE rnnn s. ENGLISH, or new LONDON, connnorrcu'r METHOD OF AND APPARATUS FOR ATTACHING JACKETS To PRESS CYLINDERS Application filed Septemlier 2, 1926. Serial No. 133,213.

"On presses used for either cutting, creasing or scoring paper, cardboard, or similar stock, or for performing two or more of these operations,stock is usually carried around the wlsurface of the cylinder while receiving the impression from the form. It is customary on such presses to provide a removable jacket forthe cylinder, made of thin, hard steel which is clamped in place against theimpression or tympan portion of the cylinder, I so that the rules of the form may act upon the stock against the hard jacket In some cases it is desirable to have the jacket extend more than 180 degrees around the cylinder,

I and the jacket is usually shaped or curved I before it is applied to the cylinder. In some cases ithasbeen customary to employ a jacket the normal curvature of which corresponded with the curvature of the cylinder and to apply it to the cylinder it was necessary to forcibly snap the jacket over the cylindeig and y when removing it a spreading mechanism was employed for expanding the jacket in order to remove it. One objection to this .3? method was that the expanding action tended to spring the jacket and increase its normal curvature so that it no longer corresponded with the curvature of the cylinder. The object of the present invention is similar to the object of my-invention shown in my copending application, Serial No. 133,212 although infthe present case I employ difierent means for accomplishing a similar result. In "the present invention the jacket is normally curved 011 an are somewhat larger than the curvature of the cylinder and when one edge of the jacket has been attached to the cylinder the remainder of the jacket is acted upon by a rolling device which rolls it down upon the cylinder until the rear edge of the jacket has been clamped tightly in I place. The means for carrying out the operation is simple in construction and operation, requiring only a short time for executing the operation, and in the preferred form of my invention certain parts commonly employed on the press torother purposes maybe utilized for therolling down operation. Other advantages of the invention .will

be apparent from the following detailed description, of my invention. I I a In the drawings forming part of this apt-j plication,

Figure 1 is a side elevation of a portion of a press adapted for cutting, scoring or creasing, and showing the present device applied thereto, I a

Figure 2 is an end elevation of the cylinder of the press and showing the rolldown 6O device at the moment when the rolling operation on the jacket is starting, v

Figure 3 is a similar view showing the roll down device at the time of the completion of its operation, I j j I j Figure 4 is a detail view of a lever device for forcing the roller against the jacket,

Figure 5 is a side elevation of the same parts, and

I Figure 6 is a plan view of the parts shown in Figures 2 and 3. I

In Figure l I have shown the sideframe l of a press adapted either for cutting, creasing or scoring, or for performing all three of these operations, my present invention bea ing adapted to be applied to a press in which any of these several operations are performed.

I have only shown such parts of the press as may be necessary to an understanding of the present invention. In this figure Ihave shown the bracket 2 which supports the feed table 3, one section of which is shown folded back to give access to the cylinder 41- which latter carries the stockaround with it while it is receiving the impression from a form 35 (not shown). At 5 I have shown a bracket attached to the side frame and it is understood that this will be duplicated at the op posite side of the press. On most presses there is a bracket of this character employed for supporting the rollers which serve to guide the stock to the delivery device as it leaves the cylinder 4t and in the preferred .form of my invention, shown herein, I utilize the same brackets and I also utilize the same rollers for rolling down the jacketwhich is usually employed in the press for guiding the stock from the cylinder, although I provide means for operating these rollers in order to perform the additional function herein reerred to.

The cylinder 4 is provided with an impression or tympan portion 28 which in the present case is shown as extending over 180 degrees of the circumference of the cylinder, and this impression portion is adapted to be covered by the jacket 6 which must fit the tympan portion closely. This jacket 6 is so formed that its normal curvature is greater than the pleriphery of the tympan portion 28 in order t at it may be laid upon the cylinder without having to spring or force its ends open to pass the maximum width of the cylinder. Any means may be employed for detachably applying the jacket to the cylinder and in the drawings I have shown simple means for accomplishing this without intending, however, to limit my invention to the use of the particular means shown. I have shown a cross bar 7 to which the leading edge of the jacket is permanently attached, preferably by rivets, and this bar 7 is adapted to seat in the socket 29 formed in the ledge 8 of the cylinder 4, and within the line of the periphery of the tympan. The bar 7 is held within the socket 29 by means of the clamps 9 which are fixed upon a shaft 30 carried by the c linder, the shaft being operated by any suita le means such as that shown in my U. S. Patent No. 1,482,391. The bar 7 has ears 31 which straddle the pintle 32 and the same is duplicated at opposite ends of the bar 7 so that when the latter is allowed to slide partly out of the socket 29 the bar and the jacket may pivot on the pintles 32 or they may be disengaged entirely to permit the removal of the jacket. have shown the gripper fingers 25 mounted on the shaft 33 and they serve the same purpose as the grippers commonly used on presses that is, they serve to hold the leadin edge of the sheet against the leading edge 0 the acket 6 in order to carry the sheet around with the cylinder.

The rear end of the jacket has a row of apertures 10 to receive the headed end of the books or pins 11 which are carried in the clamping levers 12 mounted upon the shaft 34 carried by the cylinder. The levers 12 are duplicated at various intervals along the shaft 34 and the number of apertures 10 in the jacket correspond with the number of these tightening levers. Each lever 12 is provided with a screw 13 the point of which acts at 35 against the edge of the cylinder to force the levers 12 in the direction necessary to tighten the jacket upon the cylinder after the hooks 11 have been placed through the apertures 10.

There is a shaft 14 which is journaled at opposite ends in the side brackets 5 and this shaft carries the levers 15 arranged near the ends of the shaft and fixed thereto. In the free ends of these levers 15 there are mounted rollers 17 on suitable shafts 36 and these rollers are so placed that they operate against the bearers 19 of the cylinder. There are also mounted upon the shaft 14 the levers 16 on the free ends of which are carried rollers 18 on suitable shafts 37 and these rollers 18 are adapted to roll against the outer surface of the jacket 6. There may be any number of these levers and rollers 16, 18 along the shaft 14. It will be apparent that if the rollers 17 are forced to follow closely against the bearers 19 of the cylinder while the latter is being revolved, the rollers 18 will act upon the jacket 6 to roll it tightly down against the surface of the cylinder. On the hubs which carry the levers 15 there are projecting members 20, one at each side of the press, and these are acted upon by a hold-down lever 21 pivoted on the stud 22 which is fixed in the bracket 5. These levers 21 are adapted to be adjusted up and down on the stud 22 by means of the nuts 23- shown in Figures 4 and 5 in order to regulate the pressure exerted upon the several rollers 17 and 18. I prefer to pin or key the levers 15 to the shaft 14 and to adjustably attach the levers 16 to the shaft in order to regulate the position of the rollers 18, although it will be understood that when the levers 16 have been properly adjusted their position is fixed in relation to the shaft 14. The levers 21 are adapted to be swung approximately 90 degrees in order to be entirely free of the members 20, and this will permit the levers 15, 16 to be swung into the position indicated at 24 in Figure 2 for the purpose of taking the rollers out of the way while the jacket is being applied to or removed from the cylinder.

The operation of applying the jacket to the cylinder is as follows: The rollers are swung into the position 24 indicated in Figure 2, to take them out of the way while a jacket is being applied. The grippers 25 are opened and the clamps 9 are swung back out of position and the leading. edge of the jacket is placed against the cylinder so that the bar 7 drops into the socket 29 after the pintles 32 have been received between the cars 31. The clamps 9 are then moved to press the bar 7 against the ledge 8 and the grippers 25 are swung to press against the edge of the jacket.

The operations secure the leading edge of the jacket against the cylinder and because of the shape of the jacket the rear end lies separated from the surface of the cylinder as shown at 26 in Figure 2. The levers 21 are now operated to swing down the levers 15 and 16 and this will cause the rollers 17v to press against the bearers 19 and it will also cause the rollers 18 to press against the outer surface of the jacket. The cylinder is now turned slowly in the direction of the arrow 27 until it comes into the position shown in Figure 3. During this movement the rollers 18 act upon the jacket and roll it tightly against the periphery of the cylinder, it being understood that the leading edge of the jacket is held, whereas the rear or tail end is at this time free. When the cylinder reaches the position shown in Figure 3 the rear end of the jacket can be snapped over the hooks 11 While the rollers 18 are still pressing against the jacket, and the screws 13 are then turned to force the levers 12 in a clockwise direction. This will cause the hooks 11 to draw or tighten the jacket and when the proper tension has been applied by the operation of the screws 13 the jacket will havebeen drawn down and will be held tightly against the periphery of the cylinder. It will be obvious that the rollers are not necessarily used when the acket is to be removed, as it is only necessary to slack off the screws 13 until the hooks 11 withdraw from the apertures of the jacket.

From the above it will be apparent that I have provided meansfor rolling down upon the cylinder a jacket which is normally curved on a larger arc than that of the cylinder, so that a jacket may be employed which will cover more than 180 degrees of the surface of the cylinder. I do not wish to limit my invention to the combination in which the rollers remain in the fixed position while the 1 cylinder revolves as it is obvious that the al' ternative of moving the rollers around the cylinder while the latter remains stationary could be substituted. The several levers carrying the rollers may be individually adtends more than 180 around the periphery thereof, which consists of applying a jacket which has been bent on an arc of greater diameter than the diameter of the cylinder, to the surface of the cylinder, clamping one end of the jacket to the cylinder, then rolling the jacket close down upon the cylinder-from the clamped end toward the free end and then securing said latter end of the jacket to the cylinder.

3.In a press the combination of an impression cylinder adapted to have a removable jacket applied thereto, means for securing the ends of the jacket to the cylinder and means for exerting a pressure inwardly on said jacket toward the cylinder after one end thereof has been secured to the cylinder to cause the said jacket to fit closely to the periphery' of the cylinder while the other end of the jacket is being clamped. A

4. In a press the combination of an impression cylinder adapted to have a removable jacket applied to the periphery thereof, means for securing the ends of the jacket to the cylinder, and means for exerting a progressive pressure on the jacket toward the cylinder after one end thereof has been secured to the cylinder to cause said packet to lit closely to the periphery of the cylinder while the other end of the jacket is being clamped.

5. In a press the combination of an impression cylinder adapted to have a removable jacket applied to the periphery thereof, means for securing the ends of the jacket to the cylinder, and means for exerting a progressive rolling pressure on the jacket after one end has been secured to the cylinder to cause said jacket to fit closely to the periphery of the cylinder while the other end of the jacket is being secured.

6. In a press the combination of an impression cylinder adapted to have a removable jacket normally bent on an arc of curvature greater than the curvature of the cylinders periphery applied thereto, means for securing the ends of the jacket to the cylinder, and means for exerting a rolling pressure on the jacket toward the cylinder after one end has been secured to the cylinder, to cause said jacket to fit closely to the periphery of the cylinder while the other end of the jacket is being secured.

7 In a press the combination of an impression cylinder adapted to have a removable jacket normally bent on an arc of curvature greater than the curvature of the cylinders periphery applied thereto, means for securing the ends of the jacket to the cylinder and means for bending said jacket to fit the cylinder after one end has been secured to the latter to permit the other end of the jacket to be secured to the cylinder.

8. In a press the combination of an impression cylinder adapted to have a removable jacket applied to the periphery thereof, means for delivering the sheets from the cylinder, means for securing the ends of the jacket to the cylinder and roller means adjacent the delivery device for exerting a rolling pressure on the jacket and against said cylinder to permit the jacket to be secured thereto.

9. In a press the combination of an impression cylinder adapted to have a removable jacket applied to the periphery thereof, means for securing the ends of the jacket to the cylinder and means for applying pressure on the jacket against the cylinder after one end has been secured to the cylinder, comprising rolling means acting on the jacket and adjustable means for forcing said rolling means against the jacket.

10. In a press the combination of an impression cylinder adapted to have a removable jacket applied to the perpihery thereof,

. means for securing the ends of the jacket to the cylinder, means for applying pressure on the jacket against the cylinder after one end has been secured to the cylinder, comprising rollers mounted on pivotal arms and adjustable means for forcing said rollers against said jacket.

11. In a press the combination of an impression cylinder adapted to have a removable jacket applied to the periphery thereof, means for securing the ends of the acket to the cylinder, means for applying pressure on the jacket against the cylinder after one end has been secured to the cylinder, comprising a shaft having arms, a plurality of rollers carried by said arms, one of said rollers engaging the bearers of the cylinder, and others engaging said jacket, and means for forcing said rollers to press on said jacket.

Signed atthe city and county of New London, State of Connecticut, this 25th of August, 1926.

FRED S. ENGLISH. 

